[celestica/dx010]: Fix incorrect path for voltage, current and power. (sonic-net#6128)

Fixes sonic-net#6126.

There is a bug in getting the path of voltage, current and power. The
list object is directly converted to string to format the file path. As
a result, read_txt_file will get None value and a WARNING will be
recorded. This commit fix the issue.

Signed-off-by: bingwang <[email protected]>

Author: bingwang-ms

device/celestica/x86_64-cel_e1031-r0/sonic_platform/psu.py

@@ -82,7 +82,7 @@ def get_voltage(self):
         if vout_label_path:
             dir_name = os.path.dirname(vout_label_path)
             basename = os.path.basename(vout_label_path)
-            in_num = list(filter(str.isdigit, basename))
+            in_num = ''.join(list(filter(str.isdigit, basename)))
             vout_path = os.path.join(
                 dir_name, voltage_name.format(in_num))
             vout_val = self.__read_txt_file(vout_path)
@@ -105,7 +105,7 @@ def get_current(self):
         if curr_label_path:
             dir_name = os.path.dirname(curr_label_path)
             basename = os.path.basename(curr_label_path)
-            cur_num = list(filter(str.isdigit, basename))
+            cur_num = ''.join(list(filter(str.isdigit, basename)))
             cur_path = os.path.join(
                 dir_name, current_name.format(cur_num))
             cur_val = self.__read_txt_file(cur_path)
@@ -128,7 +128,7 @@ def get_power(self):
         if pw_label_path:
             dir_name = os.path.dirname(pw_label_path)
             basename = os.path.basename(pw_label_path)
-            pw_num = list(filter(str.isdigit, basename))
+            pw_num = ''.join(list(filter(str.isdigit, basename)))
             pw_path = os.path.join(
                 dir_name, current_name.format(pw_num))
             pw_val = self.__read_txt_file(pw_path)

device/celestica/x86_64-cel_seastone-r0/sonic_platform/psu.py

@@ -92,7 +92,7 @@ def get_voltage(self):
         if vout_label_path:
             dir_name = os.path.dirname(vout_label_path)
             basename = os.path.basename(vout_label_path)
-            in_num = list(filter(str.isdigit, basename))
+            in_num = ''.join(list(filter(str.isdigit, basename)))
             vout_path = os.path.join(
                 dir_name, voltage_name.format(in_num))
             vout_val = self._api_helper.read_txt_file(vout_path)
@@ -115,7 +115,7 @@ def get_current(self):
         if curr_label_path:
             dir_name = os.path.dirname(curr_label_path)
             basename = os.path.basename(curr_label_path)
-            cur_num = list(filter(str.isdigit, basename))
+            cur_num = ''.join(list(filter(str.isdigit, basename)))
             cur_path = os.path.join(
                 dir_name, current_name.format(cur_num))
             cur_val = self._api_helper.read_txt_file(cur_path)
@@ -138,7 +138,7 @@ def get_power(self):
         if pw_label_path:
             dir_name = os.path.dirname(pw_label_path)
             basename = os.path.basename(pw_label_path)
-            pw_num = list(filter(str.isdigit, basename))
+            pw_num = ''.join(list(filter(str.isdigit, basename)))
             pw_path = os.path.join(
                 dir_name, current_name.format(pw_num))
             pw_val = self._api_helper.read_txt_file(pw_path)